How many coin dealers don't meet expenses traveling the show circuit?

I would guess some shows would be better than others but at what point do you throw in the towel and say it isn't worth it?
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I meet new people, I purchase coins, and I sell coins at shows.
I really don't try to second guess myself. I try to look at my business globaly.
One thing that I try to do is get to a show with a large local population base and ease of travel to the location.
Overall, there are not many dealers who do not make money travelling the show circuit.
I firmly believe in numismatics as the world's greatest hobby, but recognize that this is a luxury and without collectors, we can all spend/melt our collections/inventories.
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